Patents by Inventor Nisha Chandrasekharan

Nisha Chandrasekharan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for detection of drive misconfiguration in a multi-axis configuration
    Patent number: 9148042
    Abstract: A system for detecting a mismatch between how a motor drive is connected electrically and how it is configured for operation is disclosed. The motor drive may either be connected in a stand-alone mode to control operation of a motor from an AC source without connection to another motor drive or be connected electrically to other motor drives, for example, in a paralleled mode, shared DC bus mode, or a combination thereof. A parameter identifies the expected electrical configuration of the motor drive. The power transferred to the DC bus is compared to the power transferred from the DC bus in the motor drive. If the difference between the power transferred to the DC bus and the power transferred from the DC bus exceeds a predetermined threshold, the motor drive detects the mismatch between how a motor drive is connected electrically and how it is configured for operation.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: September 29, 2015
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Nisha Chandrasekharan, Gerry Nagel, Arun K. Guru, Ryan Jwanouskos
  • Method and Apparatus for Detection of Drive Misconfiguration in a Multi-Axis Configuration
    Publication number: 20150091486
    Abstract: A system for detecting a mismatch between how a motor drive is connected electrically and how it is configured for operation is disclosed. The motor drive may either be connected in a stand-alone mode to control operation of a motor from an AC source without connection to another motor drive or be connected electrically to other motor drives, for example, in a paralleled mode, shared DC bus mode, or a combination thereof. A parameter identifies the expected electrical configuration of the motor drive. The power transferred to the DC bus is compared to the power transferred from the DC bus in the motor drive. If the difference between the power transferred to the DC bus and the power transferred from the DC bus exceeds a predetermined threshold, the motor drive detects the mismatch between 110W a motor drive is connected electrically and how it is configured for operation.
    Type: Application
    Filed: October 1, 2013
    Publication date: April 2, 2015
    Applicant: Rockwell Automation Technologies, Inc.
    Inventors: Nisha Chandrasekharan, Gerry Nagel, Arun K. Guru, Ryan Jwanouskos